Reviews by patients who have Tooth Pain and take Zinc either as part of daily diet or as method of treatment. Positive and negative experiences from patients with Tooth Pain that take Zinc
1 Red or black colored stool may be a sign of bleeding in the GI tract (from the esophagus, stomach, small intestine or colon) and should not be ignored.  When stool color changes, what tests need to be done depend upon depends upon what cause is suspected for the stool color change.
Black stool: may indicate bleeding in the stomach or the upper part of the small intestine. Black stool that results from a gastrointestinal bleeding is often associated with a tarry texture and foul odor. Iron pills or certain medications, like Pepto Bismol, may also cause black stool.